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14 of 14 people found the following review helpful
This is a good product but can be (as I found out) very tricky to fit. I am a very experienced DIY person but it still took me a considerably long time to satisfactorily fit the opener as I had to dismantle the window to enable me to fit it.

Now that it is installed, I am perfectly happy with it - it works well.Greenhouse Auto Vent Window Opener
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12 of 12 people found the following review helpful
on 18 July 2011
Good construction with a matt black finish. I had to mess about a little when installing it using screwdrivers and pliers. Took me about 40 minutes to clamp it to the aluminium greenhouse frame. So a small amount of intelligence, a little DIY knowledge, basic tools and some patience I would recommend at this point. I lubricated the piston arm and followed the instructions to set the opening mechanism and it has been installed for about 2 years now and still working perfectly. One of the best priced also.
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15 of 16 people found the following review helpful
on 21 May 2010
For years I have lived with opening and closing my greenhouse roof window manually. Some days I have lost tender young plants due to too much heat when I have gone out.With my new temperature activated vent opener I no longer have to worry. The unit came well boxed with full fitting and adjustment instructions.I found it easy to assemble and fit to my greenhouse even when full of plants.A great purchase!I wish I had bought it several years ago. I thoroughly recommend it to other gardeners.
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7 of 7 people found the following review helpful
on 6 July 2010
I have had this "opener"for less than a year and so far three cylinders have failed just as it starts to get hot!
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3 of 3 people found the following review helpful
on 9 August 2013
Having had problems fitting vents when I bought my greenhouse some years ago, I read the reviews and ordered this with some trepidation. To my surprise I found that it was exactly the same as the original, and having a model to follow I replaced it in a few minutes. Very pleased!

The first time around I fitted the two extra hairpins (rather than lose them!). Not sure what effect they had, but they made it sufficiently troublesome to remove the cylinder at the end of summer that I never did. Possibly that led to the early demise of the pistons, which was the reason I had to buy replacements.

I'm certainly not going to bother with the hairpins this time; I *am* going to remove the cylinders over winter. And hopefully store them somewhere that I can find them again. May be I'll leave a note on the window frame.
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4 of 4 people found the following review helpful
on 6 November 2011
Really quick delivery and really easy to fit, and adjust. We fitted them to a wooden green house and had no problems working out how to put together and fit.
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8 of 9 people found the following review helpful
on 18 March 2009
Auto ventI am delighted with this product. Easily installed and works at 28 degrees f
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2 of 2 people found the following review helpful
on 18 August 2011
Very happy with this Guardman Greenhouse Vent which works perfectly.
Just the job for keeping the greenhouse from overheating in summer.
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2 of 2 people found the following review helpful
on 10 May 2011
Works well - does exactly what it claims to do. Fitted quite easily, though the threading up of the small screws was a bit of a fiddle.
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2 of 2 people found the following review helpful
on 12 September 2011
Excellent piece of kit, the previous auto vent lasted 5years I am sure this one will also go the course...
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